I've been thinking the same thing. I'm curious to see what you come up with
I haven't heard of it, but maybe you could ask on r/tipofmytongue on Reddit? I don't really use Reddit, but I posted on there when I was trying really hard to find this obscure story and somebody found it within two days! I think it's worth a shot if nobody on here is able to find it.
Could it be Flickchart by any chance?
A tag can only be a single word, and can only contain letters and numbers.
Select the tags you would like to remove:
You are going to block this site. This will do the following:
Are you sure you want to do this?